Karl-Otto_Apel--Jurgen_Habermas

Karl-Otto Apel (German: [ˈaːpl̩]; 15 March 1922 – 15 May 2017) was a German philosopher and Professor Emeritus at the University of Frankfurt am Main. He specialized on the philosophy of language and was thus considered a communication theorist. He developed a distinctive philosophical approach which he called "transcendental pragmatics."